Electrical heater.



F. KUHN.

ELECTRICAL HEATER.

APPLIGATION FILED .11.11.10, 1914.

1, 1 1 9,841 Patented Dec. 8, 1914;

Mmm www www QQ@ FRANK KUHN, OF DETROIT, MIGI-IIGAN.

, ELECTRICAL HEATER.

Specification of Letters Patent.

Patented Dec. 8, 1914.

Application filed January 10, 1.914. Serial No. 811,313.

To all whom t may concern Be it known that I, FRANK KUHN, a citizen ofthe United States of America, residing at Detroit, in the county ofWayne and State of Michigan, have inventedcertain new and usefulImprovements in Electrical Heaters, of which the following iS aspecication, reference being had therein to the accompanyin drawings.

The invention relates to electrical heating units, and has moreparticular reference to the means for providing insulated supports forthe resistor.

It is the object of the invention to obtain a construction which isinexpensive to manufacture, which is adapted to be vari.- ouslyfashioned to suit different conditions and which will provide thoroughlyinsulated, heat-resisting supports at as many points as necessary in thelength of the conductor.

In the drawings: Figure 1 is an elevation showing one construction of myheating element; Fig. 2 is an enlarged cross section thereof; Fig. 3 isa cross section through a modified construction; Fig. l is a perspectiveview showing another modication; and Fig. 5 is a perspective View of oneof the resistor supports detached.

A is the resistor which may be of any suitable construction, but isshown in the form of a wire coil.

B are supporting members for the resistor, preferably formed of sheetmetal stampings having an eye portion C and shank portion D, the latterbeing twisted into a transverse plane. To insulate the members B-theyare connected to a strip E,

with mica or other suitable insulating material F laid therebetween.Preferably, the

strip E is' formed of sheet metal and of a U-shaped cross section, andthe Shanks D are placed between the two plies of the strip with theinsulation F arranged therebetween, as shown. The strip E and the ShanksD are also preferably provided with complementary projections andindentations', such as the beads G and H', and which form an interlock.Thus, when the U- shaped strip E is lsuitably compressed it will form aclamp for retaining all of the supporting members B in fixed osition,while the insulation between the slfanks D and the strip E will preventshort circuit-'- ing.

`In Fig. l a straight strip is represented with a plurality of supportsB distributed along the length thereof. In Fig. 3 a pair of strips E andE are arranged upon opposite sides of the supporting members B, andengage oppositely-eXtending shanks D and D thereof. In Fig 4 the stripsE2 are bent into circular form and the resistor A extends back and forthacross this circle, being engaged with the eyes C at different pointsthereon. It is obvious that the strips E may be fashioned into variousshapes to support the resistor in any position desired.

at I claim as my invention is,-

An insulated support for resistor, comprising a sheet metal member forengaging the resistor, having a shank portion bent into a transverseplane, a clamping member for embracing said shank member having aninterlocking engagement therewith, and insulating material arrangedbetween said shank member and clamping strip.

2. An insulated support for resistor,

comprising a longitudinally beaded -metallic strip, a series ofsupporting members having beaded shank portions for engaging said beadedstrip, and insulating material between said shank portions and strip.

3. An insulated support for resistor, comprising a metallic strip ofU-shaped cross section, having complementary longitudi nally-extendingbeads, a series of supporting members provided with shank portionshaving complementary beads and embraced by said U-shaped strip member,and insulating material clamped between said shank portions and strip.

4. An insulated support for a resistor, comprising a sheet metal memberfor engaging the resistor, said member having a shank portion providedwith a lateral offset, a *clamping member for embracing the shankportion of said member,'fa'nd being provided with an offset portioncomplementary to' that of the shank portion, an insulating materialarranged between said shank portion and clamping member, said shankportion, clamping memberaand insulating material 4 being locked in placeby the engagement of said complementary ofi"- set portions.

5. An insulated support for a resistor, sulating material arrangedbetween said comprising a pair of metallic strips of U- shank membersand said metallic strips. 10 shaped cross section spaced apart and open-In testimony whereof Iv ax my signaing toward each other, and a seriesof supture in presence of two witnesses. 5 Sorting members extendingbetween said FRANK KUHN.

-shaped strips having shank portions em Witnesses: braced by said stripand transversely bent Y JAMES` P. BARRY,

portions for engaging the resistor, and in- HENRIETTA E. BOWMAN.

